Add initial CertVerifyProcBuiltin.

net/cert/internal/path_builder.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_CERT_INTERNAL_PATH_BUILDER_H_
 #define NET_CERT_INTERNAL_PATH_BUILDER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 14 matching lines @@
 class CertPathIter;
 class CertIssuerSource;
 class SignaturePolicy;
 
 // CertPath describes a chain of certificates in the "forward" direction.
 //
 // By convention:
 //   certs[0] is the target certificate
 //   certs[i] was issued by certs[i+1]
 //   certs.back() was issued by trust_anchor
+//
+// TODO(eroman): The current code doesn't allow for the target certificate to
+//               be the trust anchor. Should it?
 struct NET_EXPORT CertPath {
   CertPath();
   ~CertPath();
 
   scoped_refptr<TrustAnchor> trust_anchor;
 
   // Path in the forward direction (path[0] is the target cert).
   ParsedCertificateList certs;
 
   // Resets the path to empty path (same as if default constructed).
@@ skipping 117 matching lines @@
   State next_state_;
 
   Result* out_result_;
 
   DISALLOW_COPY_AND_ASSIGN(CertPathBuilder);
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_INTERNAL_PATH_BUILDER_H_